Libel and Slander

You run a news website. One of your contacts has some information about a major election. The information is concerning an on going extra-marital affair. You have a suspicion that the information is from an opposing candidate. But because of the time constraints you are not able to research the story thoroughly before running it.

What Would You Do?

Would you not run the story now with the realization that the election may be decided before you find out the truth from a verifiable source?

OR

Would you decided to print the story knowing the information would effect the election?